I'm planning to replace my tranny fluid with a good synthetic. Lots of people recommend Redline, but it is not to be had locally for me. Where does one acquire it, short of the internet? If I don't go with Redline, is there another brand that will work just as well, such as Mobile 1? I also plan to replace the filter screen. Is a full flush of the system worth it, or should I just drain what I can? Should I even bother with synthetic? I will not be running this tranny with any boost.